Someone plz help!! I’ll mark u as the most brainliest :) thx

How many moles of carbon dioxide will form if 2.5 moles of c3h8 is burned

Before it was launched, a helium-filled balloon had a pressure of 201 kpa at a temperature of 27°c. at an altitude of 15,000 m, the pressure had decreased to 2.5 kpa and the temperature had dropped to -14 °c. the volume of the balloon increased to 59.3 m3. what is the original volume of the balloon? 13 m3 0.85 m3 0.077 m3 1.17 m3

What is the chemical name of the compound ti2o3? use the list of polyatomic ions and the periodic table to you answer.